The contractor is expected to finish by the end of September, so Carnaggio tells WTOP-FM (http://bit.ly/1a5H9Zk) that the project will be turned over to Metro by October. He says Metro will then take at least 90 days to independently test the trains and tracks and hire staff.

Work on the second phase, which will extend Metrorail into Loudoun County past Dulles Airport, is expected to begin in July and be complete in five years.